Chapter 10 Other Stuff Flashcards
Most stars are considerably smaller in radius and dimmer than the sun. True or false?
True!
Of the 20 brightest stars in the sky, only 6 are within 10 parsecs of earth, fat fewer than the number of red dwarf stars. Large stars are more visible because of their high intrinsic luminosity.
Compared to other stars, the suns mass is about average. True or false?
False.
Most stars are less massive than the sun.
The Doppler effect is used to determine a stars what?
Radial velocity
Proper motion
The annual motion observer after correcting for the parallax changes caused by earths motion
Is it possible to determine the temperature of a star by measuring the stars apparent brightness at two different wavelengths?
Yes!
With two points the blackbody curve can be determined. From the peak wavelength of the curve the temperature can be determined.
Red giant stars
Cool and luminous stars of enormous size that have left the main sequence
Stars spend most of their lives as what?
Main sequence stars
White dwarfs
Remnants of low mass stars that don’t produce energy via nuclear fusion anymore. They are very compact about the size of a planet but still about as massive as the sun
Stars in binary systems are more common in our galaxy than single stars. True or false?
True
